Hydraulic telescopic flagstaff.



LLAVBRY. HYDRAULIC TELESGOPIG FLAGSTAFF.

APPLIUATION FILED AUG.1, 1908.

Pantfell'el A111225, 1911.

JAMES LAVERY, 0F CARRICKFERGUS, IRELAND.

HYDRAULIC TELESCOPIC FLAGSTAFF.

Specification of Letters Patent.

Patented Apr. 25, i911.

Application filed August 1, 1908. SeralNo. 446,495.

To all 'whom 'it may concer/n:

Be it known that l, JAMES LAVERY, a subject of the King of GreatBritain, residing at Carrickfergus, in the county of Antrim, Ireland,have invented a new and useful Improvement in Hydraulic TelescopicFlagstafs, of which the following is a specification.

This invention relates to hydraulic telescopic Ha2` a flag staff whichcan be readily telescoped when not in use so that it will occupy a verysmall space.

Another object of the invention is to provide a flag staff which can bereadily moved from place to place so that the pole can be set up in anydesired position.

A further object of my invention is to provide a flag staif which iscomposed of a plurality of telescoping sections having a plurality oftelescoping shell sections arranged over the same so as to strengthenthe same and form a neat appearance, the telescoping sections beingconnected to a hydraulic jack whereby th staff can be extended quicklyby operating t e jack.

With these various objects in view, my in# vention consists in the novelfeatures of construction and arrangement of parts herein-r after fullydescribed, pointed out in the claim and shown 'in the accompanyingdrawings, in which- Figure 1 is a vertical section through my improvedflag stad in an extended position. Fig. 2 is a side elevation of thesame in a telescoped position. Fig. 3 is a detail verti-` cal enlargedsection. Fig. 4 is an enlarged:

y horizontal section.

ln carrying out my improved invention, I employ a plurality of similarlyformed telescoping tube sections A, the lower one of which is arrangedon a base Band the upper one is closed as clearly shown at C and carriesa. solid section l) provided with the ordinary pulley through which theordinary halyards pass. This section can be formed of any suitablematerial such as wood in order to decrease the weight. The ends of thesections A are provided with internal flanges E fno-acting with eachother so as to limit the movement of the sections and to form a liquidtight joint for a purpose hereinafter fully described.

of sta's the object being to provide v Arranged over the sections A area plurality of similarly formed shell sections F the upper section ofwhich is'connected to the closed end C of the upper section so that whenthe inner sections are extended these sections will be also extended.These sections overlap each other lslightly and are so formed that whenin an extended position a tight joint will be formed between the same soas to strengthen the' joints of the sections and form a neatappearance.

A ring G is arranged on the upper section of the shell provided withoppositely disposed eyes G to which braces H are adapted to be connectedso that the iag staff will be held in a rigid position when extendedwhereby all danger of the flag staff being blown downis prevented. i

A hydraulic jack J is arranged on the be seen that when the sections areextended the braces H will be drawn tight so as to form. a rigid staff.

From the foregoing description, it will be readily seen that I haveprovided a flag staff which is composed of a plurality oftelescopingsections having a plurality of telescoping shell sectionsarranged over the same so as to form a neat appearance. It will also beseen that the stad can be readily telescoped so that it will occupy avery small space whereby when not in use, it can be readily stored -orshipped.

By constructing a ag staff of a plurality of telescoping tubes havingplurality of reinforcing shell sections carried, thereby the stiffnessof the stati' is greatly increased.

What l claim is In a flag stad, the combination with a base, of a staffformed of a plurality of sections consisting of telescoping tubes, the

lower tube being rigidly connected to said said base 105 base, ahydraulic jack mounted on communicating with sald tubes, a solid sec- 2i 99o,57o

tion for closing the upper tube, said sections upper tubular casingresting on the flanges being provided with annular flanged ends, of theshell and provided with eyes, and eo-acting with each other, each ofsaid secbraces connected to said eyes.

tions carrying a reinforcing casing forming k JAMES LAVERY. 5 a shell,each of said casings being provided Witnesses:

With a flanged end coacting lWith the adja.- H. OSMUND,

cent casing, a ring slidably mounted on the G. H. KENT.

